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| Author | Topic:MPS-1 connect to Campbell data logger(CR1000) | 1855 Views |
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MPS-1 connect to Campbell data logger(CR1000)
17 December 2010 at 10:00pm
HI,I'm using the MPS-1 connect to the Campbell datalogger(CR1000),but there are some problem about that data performed on the Loggernet software(Campbell),my doubt is that the MPS-1 resolution maximum is -500kpa,but the data performed on the pc was over -500kpa,otherwise reached to -13xxkpa!I am wondering the reasonable range before taking to the experiment field.
p.s:the sensor is testing without any influenceThe power I use is 12DC 80A,I suspect the calibration I type correct or not:-e^(4.8*10^-5*mV^2-8.46*10^-2*mV+39.45)
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Re: MPS-1 connect to Campbell data logger(CR1000)
20 December 2010 at 9:31am Last edited: 20 December 2010 9:32am
The MPS-1 will give you data below (dryer than) -500 kPa, but we only specify an accuracy down to -500 kPa. The sensor will show real trends in water potential below -500 kPa, but calibration inaccuracies as well as sensor to sensor variability greatly increase below -500 kPa. If you are going to use data below -500 kPa it is recommended that you do an accuracy check (or calibration) on your MPS-1 as best you can. This can be done with a pressure plate, but it may take some time to equilibrate in the plate when you get down around -1000 kPa.
NOTE: 12 VDC exceeds the power specifications for that sensor. Excitation at that level risks damaging the circuitry of your sensor and invalidates your warranty. Please do not operate the MPS-1 out of its specified range of 2-5 VDC. The VX# ports on your CR1000 are ideal for providing power for the MPS-1 at 2500 mV.
Your equation stated below is the appropriate factory calibration for the MPS-1 in mV. The accuracy of the MPS-1 can be improved by a sensor specific calibration.
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